Pith Number

pith:EP7MAV6Y

pith:2021:EP7MAV6YIF7RFVC6CKIFIOXATM

not attested not anchored not stored refs pending

Looking Beyond Corners: Contrastive Learning of Visual Representations for Keypoint Detection and Description Extraction

Henrique Siqueira, Ibrahim Halfaoui, Markus Karmann, Onay Urfalioglu, Patrick Ruhkamp

arxiv:2112.12002 v2 · 2021-12-22 · cs.CV

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EP7MAV6YIF7RFVC6CKIFIOXATM}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T04:38:46.874540Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

23fec057d8417f12d45e1290543ae09b00124d8ea85e02aa3d24c0d60a109a51

Aliases

arxiv: 2112.12002 · arxiv_version: 2112.12002v2 · doi: 10.48550/arxiv.2112.12002 · pith_short_12: EP7MAV6YIF7R · pith_short_16: EP7MAV6YIF7RFVC6 · pith_short_8: EP7MAV6Y

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/EP7MAV6YIF7RFVC6CKIFIOXATM \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 23fec057d8417f12d45e1290543ae09b00124d8ea85e02aa3d24c0d60a109a51

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c053135b14a0dddd0216aa69efe9eb9bc388f6c5fc3870cc7f11b214f4d32b25",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-12-22T16:27:11Z",
    "title_canon_sha256": "b918304ca87f4cca5bf9bed0c4cac636449344c17694d2d413c306d6e8374f01"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.12002",
    "kind": "arxiv",
    "version": 2
  }
}